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10 A chemical reaction involves rearrangement of constituent atoms of the reactants to form different substances as produits. Ano (E) 17 Decomposition reaction involves a single compound breaking up into two or more elements or compounds. Ans (C) la Combustion reaction envolues a substance reacting with oxygen to give another substance giving off heat & light (A) Ans 19) Bases turn Ans (a) red litmus paper blue

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